OF ARTS AND SCIENCES. 133 



Latiiyuus Nevadensis.* Sk'iulci', usually a spau lii^^li, liuily 

 pubesceut or nearly glabrous : stipules semi -sagittate, the lobes nar- 

 rowly acuminate ; leaflets tliiu, two to four pairs, ovate to ovate- 



* Tlie North American species of tiiis genus ruay be arrangeil as follows : — 



§ 1. Rhachis of the leaves tendril-bearing: peduncles mostly equalling or ex- 

 ceeding the leaves : pod sessile. 



* Annual : racemes 1-2-flowered. 



1. L. pusiLLCS, Ell. Glabrous ; stems winged : leaflets 2, narrow : flowers 

 small, purple : pod linear: seeds minutely tuberculate. — S. Carolina to Texas. 



The L. Enfjelmanni, Bischof in Linntea, 14. 182 (Litt.-Bericlit), from near 

 Fort Gibson, Arkansas, may be distinct. It is described as with oblong leaves, 

 ciliate stipules, and seeds " rugulosoexsculptis." 



* * Perennials : racemes several-flowered. 



t- Stipules large, ovate or somewhat semi-hastate with broad lobes : stout and 

 glabrous, e.xoepting forms of L. marilimus. 



2. L. MARiTiMus, Bigel. Stipules broadly ovate, acute: leaflets 6 to 10, 

 thick, ovate-oblong, obtuse or acutish, 1 or 2 inches long, nearly sessile : 

 flowers large (9 lines long), purple: calyx-teeth sparingly ciliate. — Seashore, 

 from New Jersey and Oregon northward, and on the Great Lakes. The high 

 northern and arctic form is low and more slender, and more or less densely 

 pubescent. 



3. L. POLYPHYLLUS, Nutt. Stipules smaller, triangular, scarcely longer 

 than broad, acute or acuminate ; leaflets 12 to 20, thin, oblong, distinctly petio- 

 lulate : otherwise Uke the last. — N. California and Oregon, near the coast. 



4. L. ocHROLEUCDS, Hook. Stipules semi-cordate ; leaflets 6 to 8, thin, 

 ovate, obtuse or acutish : flowers smaller, ochroleucous. — Northern United 

 States from New England to Washington Territory, and north to Lake Win- 

 nipeg. 



5. L. suLPHUREus, Brewer. Glaucous : stipules semi-cordate or semi-sagit- 

 tate ; leaflets 6 to 20, oblong-ovate to linear-lanceolate, about an inch long, 

 acute : flowers sulphur-yellow, 6 lines long. — In the Sierra Nevada. 



-t- ■*- Stipules narrower, semi-sagittate, the lobes usually lanceolate, acuminate : 

 flowers purple or purplish. 



++ Leaflets 8 to 12 : peduncles rather many-flowered. 



6. L. VENOSus, Muhl. Stout, climbing, usually somewhat downv : stipules 

 mostly narrow and short ; leaflets oblong-ovate, mostly obtuse, about 2 inches 

 long : flowers 6 to 8 lines long : calyx densely pubescent to nearly glabrous : 

 ovary smooth. — Through the Atlantic States to the Saskatchawan, and thence 

 to Washington Territory. 



Var. Californicus. Stems very stout, often strongly winged : stipules 

 broader ; leaflets acute and narrower : flowers larger. — Sonoma County to 

 Monterey, California, and in the foothills of the Sierra Nevada ; near water. 

 Intermediate forms occur. 



